Celeb BFF Date Nights! Too Cute!

Katy Perry announced her date to this Sunday's Grammy Awards is none other than Girls star Allison Williams. While most people are surprised that Katy is opting to take a bestie instead of her current bfJohn Mayer, it is not the first time she's brought along an equally famous plus one.

Check out this gallery of celebrity gal pals who have taken each other as dates, from major awards shows to a fun girls' night out. Meanwhile...Taylor Swift and Carrie Underwood are reportedly avoiding each other on Sunday.